JP7124253B2 - Method for constructing through-holes in concrete placement and cylindrical member usable for forming through-holes - Google Patents

Description

The present invention relates to the construction of concrete wall materials, beams, slabs, etc. in construction work such as concrete casting, in which through holes are formed for installing pipes and wiring, and in particular, formwork such as sleeves and pipes. It relates to the installation of through frame materials.

Generally, in concrete building structures, formworks such as sleeves and tubular penetration frames such as pipes are used to bury exhaust, water distribution, ventilation pipes, etc. in concrete, or to form wiring passages. For example, plate-like temporary frames (formwork) are installed vertically or horizontally before concrete is placed, and pipes and the like are fixed between the temporary frames. After placing the concrete, the temporary frame is removed, and the piping installed inside the concrete is connected to the external piping.

It is necessary to position the sleeve at a predetermined position within the temporary frame in order to prevent the sleeve from moving during concrete placement. For example, a sleeve holder having a C-shaped cross section is attached to a reinforcing bar provided in a temporary frame, and the sleeve is attached to the holder (see Patent Document 1).

A construction method is also known in which two temporary frames are first installed so as to face each other, and pipes and the like are fixed while being moved between the temporary frames (see Patent Document 2). There, plugs with bolts and springs are installed at both ends of the pipe, and the pipe is vertically moved between temporary frames facing each other. Upon reaching the hole provided in the fixed position of the temporary frame, the end of the bolt, which is biased by the spring, protrudes through the hole in the temporary frame, thereby positioning the pipe.

JP 2010-248883 A Japanese Patent No. 3642525

When installing a sleeve or the like in a place away from the place where the reinforcing bars are arranged or in a place where the space is narrow, it is difficult to fix using the sleeve holder. In particular, the mounting work is difficult at a location near the base where the temporary frame is to be installed or at a location deep from the worker's scaffolding. In addition, depending on the complicated arrangement of reinforcing bars, it is not possible to move forms such as sleeves and pipes between temporary frames.

Therefore, when forming a through-hole in placing concrete, it is required that a form for forming a through-hole can be easily fixed to the temporary frame.

A method for constructing a through-hole, which is one aspect of the present invention, includes the steps of installing a first temporary frame, and attaching a rod-shaped member to at least one end of a tubular form or pipe remote from the first temporary frame. installing a tubular member that is engageable and in contact with the end surface and/or the inner surface of the formwork or the pipe; and passing through. Either the order of passing the rod-shaped member into the pipe or the order of engaging with the tubular member may be made first. Then, a step of fixing the rod-shaped member to the first temporary frame is included so that the cylindrical member exerts a force along the axial direction on the formwork or the pipe toward the first temporary frame. Fixing to the first frame may be performed at or near the other end of the rod-like member. Alternatively, the formwork or pipes may be fixed so as to receive force from both sides of the first temporary frame and the second temporary frame, or the formwork or pipes may be fixed so that the cylindrical member is pulled by the rod-shaped member. You may press to the temporary frame side of 1.

Furthermore, the method for constructing a through hole of the present invention includes a step of installing the second temporary frame in alignment with the position of the formwork or pipe fixed to the first temporary frame, and a step of connecting to the temporary frame; a step of releasing the fixation of the rod-shaped member to the first temporary frame after placing the concrete; and a step of removing the second temporary frame while the cylindrical member is connected. include. Any connection method can be applied to the step of connecting the cylindrical member to the second temporary frame, and it is sufficient that the cylindrical member can be removed together with the second temporary frame when the second temporary frame is removed.

A method for constructing a through-hole, which is one aspect of the present invention, includes a step of installing a first temporary frame, and at least one end of the formwork or pipe away from the first temporary frame, the formwork or pipe. installing a tubular member capable of contacting the end surface and/or the inner surface; securing the formwork or pipe to the first temporary form by securing to the first temporary form at the ends.

A tubular member that is one aspect of the present invention is a tubular member that can come into contact with the end surface and/or the inner surface of a tubular form or pipe when installed at one end of the form or pipe. hand,
It can be engaged with a rod-shaped member installed on the opposite side of one end of the formwork or pipe along the central axis, and when the other end of the rod-shaped member is fixed to the first temporary frame , a force along the axial direction can be applied to the formwork or pipe in the engaged state toward the first temporary formwork. Then, it can be connected to a second temporary frame on the opposite side of the first temporary frame.

ADVANTAGE OF THE INVENTION According to this invention, the formwork for through-hole formation etc. can be easily fixed to a temporary frame at the time of through-hole formation in concrete placing.

FIG. 4 is a cross-sectional view showing members used for formwork and through-hole formation in the first embodiment. FIG. 4 is a plan view showing a cylindrical member used for forming through holes; FIG. 4 is a plan view showing a cylindrical member used for forming through holes; It is the figure which showed a part of process of construction which forms a through-hole. It is the figure which showed a part of process of construction which forms a through-hole. It is the figure which showed a part of process of construction which forms a through-hole. It is the figure which showed a part of process of construction which forms a through-hole. It is the figure which showed a part of process of construction which forms a through-hole. FIG. 10 is a plan view of a plug in a second embodiment; It is a cross-sectional view of the plug in the second embodiment. FIG. 11 is a plan view of a plug in a third embodiment; FIG. 10 is a cross-sectional view of a plug in a third embodiment; FIG. 11 is a cross-sectional view showing members used for formwork and through-hole formation in a fourth embodiment; It is a top view of the plug in a 4th embodiment. FIG. 11 is a plan view of a plug in a fifth embodiment; FIG. 11 is a cross-sectional view of a plug in a fifth embodiment; FIG. 11 is a cross-sectional view of a plug in a sixth embodiment; FIG. 11 is a cross-sectional view of a plug in a seventh embodiment;

Hereinafter, a construction method for forming a through hole, etc., which is an embodiment of the present invention, will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing members used for formwork and through-hole formation in the first embodiment. 2 and 3 are plan views showing cylindrical members (hereinafter referred to as plugs) used for forming through holes.

A through-frame member (hereinafter referred to as a formwork) 100 is composed of a pipe 105 made of vinyl or the like and tubular joints 110 and 120. Inner surfaces 110K and 120K of the joints 110 and 120 are provided along the entire circumferential direction. Protrusions 112 and 122 are formed at the ends. Both end faces of the pipe 105 are attached to the joints 110 and 120 with an adhesive or the like, and are integrally constructed. It should be noted that the outer peripheral surface of the vinyl pipe 105 may be joined to part of the inner surfaces 110K and 120K of the joints 110 and 120 with an adhesive or the like.

The plugs 20, 40 are cylindrical members that can be used to fix the formwork 100 to the temporary formwork. arranged coaxially. Here, the plug 20 is installed at one end 100T2 of the mold 100 and the plug 40 is installed at the other end 100T1. The plugs 20 and 40 are made of synthetic resin such as vinyl chloride, and can be screwed.

The plugs 20 and 40 are provided with body portions 20B and 40B having sizes corresponding to diameters near both ends 100T2 and 100T1 of the mold 100, and flanges 25 and 45 are formed on one surface 20S1 and 40S1 sides, respectively. ing. When the plugs 20, 40 are respectively installed on both ends T2, T1 of the mold 100, the end faces 110S, 120S of the joints 110, 120 abut the surfaces 25S, 45S of the flanges 25, 45.

The plugs 20, 40 have through holes 22, 42, respectively, and are provided with stepped portions 21, 41, respectively, which widen the space toward the flanges 25, 45 side. As shown in FIGS. 2 and 3, the relatively large diameter hole portion 22B is formed in a hexagonal shape, and the relatively small diameter hole portion 22A is formed in a circular shape. The through holes 22, 42 of the plugs 20, 40, including the stepped portions 21, 41, have the same shape and size. On the other hand, the flanges 25, 45 of the plugs 20, 40 are different in size, and the flange 45 is formed with a hole 41A through which a nail can be passed.

The bolt 60 is a rod-shaped member used when fixing the formwork 100 to the temporary frame, and here, it is composed of a fully threaded bolt with a male screw 60M formed over the entirety. A nut 62 is screwed onto one end 60T2 of the bolt 60, and nuts 64 and 66 having different sizes here are screwed onto the other end 60T1. Portion 22A of throughbore 22 and bore portion 42A of throughbore 42 of plugs 20, 40 are sized to allow bolt 60 to pass therethrough. Also, the bore portions 22B, 42B of the plugs 20, 40 are shaped and sized to accommodate hex-shaped nuts 64,66.

4 to 8 are diagrams showing a process procedure for forming a through-hole.

After the reinforcing bars F are arranged, the worker first installs one plate-like temporary frame (hereinafter referred to as a first temporary frame) F1 at a predetermined location. Here, it is installed along the vertical direction. An operator installs the plugs 20 and 40 on both ends 100T1 and 100T2 of the formwork 100 which is a through frame material. Then, the bolt 60 is passed through the mold 100, the nut 62 is screwed onto the end portion 60T2 of the bolt 60, and the nut 64 is screwed onto the end portion 60T1 of the bolt 60.

After the nut 62 is screwed onto the end portion 60T2 of the bolt 60, the bolt 60 is passed through the through hole 22 of the plug 20, the frame 100, and the through hole 42 of the plug 40, and is inserted into the end portion 60T1 of the bolt 60. A nut 64 may be screwed thereon.

After passing the bolt 60 through the hole FN formed in the first temporary frame F1, the operator tightens the nut 66 from the outside of the first temporary frame F1 via the washer W to fix the bolt 60 (Fig. 5). The nut 62 screwed onto the end 60T2 of the bolt 60 contacts the stepped portion 21 of the plug 20 and does not rotate in the hole portion 22A of the plug 20. As shown in FIG. Thus, as the nut 66 is tightened, the formwork 100 receives axial forces from both the plugs 20,40.

When the nut 66 is further tightened to fix the bolt 60 to the first temporary frame F1, the form 100 abutting the flange 25 of the plug 20 is positioned while being pushed from the plug 20 toward the first temporary frame F1. be. When the formwork 100 receives a force along the axial direction acting toward the first temporary frame F1 from the end 100T2 opposite to the first temporary formwork F1, the formwork 100 moves in the axial direction. It is fixed to the first temporary frame F1 while maintaining the horizontal direction. Further, here, the plug 40 is connected to the first temporary frame F1 by driving the nail P into the first temporary frame F1 through the hole 41A formed in the plug 40. As shown in FIG.

After fixing the form 100 to the first temporary frame F1, the other plate-shaped temporary frame (hereinafter referred to as the second temporary frame) F2 is attached to the end portion 100T2 of the form 100 (the surface 20S1 of the plug 20). (see Figure 6). Then, the operator uses screws B to screw the plug 20 to the second temporary frame F2. The screwing is performed, for example, at predetermined intervals along the peripheral direction shown in FIG.

When the formwork 100 is positioned and fixed between the first and second temporary frames F1 and F2, a predetermined amount of cement is poured while being tamped. When the cement hardens to form concrete CF (see FIG. 7), the nuts 66 are removed from the bolts 60 to release the fixing of the bolts 60 to the first temporary frame F1. Then, the bolt 60 is pulled out from the formwork 60 by turning the bolt 60 in the loosening direction.

After that, the worker removes the first temporary frame F1 while being connected with the plug 40, and removes the second temporary frame F2 while being connected with the plug 20 (see FIG. 8). As a result, through holes OP are formed in the concrete CF. It should be noted that the bolt 60 may be pulled out together with the first temporary frame F1 or the second temporary frame F2 while being screwed to either one of the nuts 62 and 64 without being pulled out from the inside 60 of the formwork.

As described above, according to the present embodiment, the plugs 40 and 20 are installed at both ends 100T1 and 100T2 of the formwork 100 which is a through frame material, and one end 60T2 of the bolt 60 is not protruded from the plug 20, and the plug 20 and a through hole 22 formed around the central axis are engaged with each other, passed through the mold 100 and protruded from the plug 40 . Then, the nut 66 is tightened to the first temporary frame F1 on the other end 60T1 side of the bolt 60 to position and fix the formwork 100 to the first temporary frame F1. When the second temporary frame F2 is installed, the plugs 20 are screwed from the front side of the second temporary frame F2 and connected. After placing the concrete, the first and second temporary frames F1 and F2 are removed while the plugs 40 and 20 are still attached.

The formwork 100 can be positioned in the horizontal direction only by the first temporary frame F1, without the need for work to attach a sleeve holder or the like to the reinforcing bar F or the like, and without installing the second temporary frame F1. 100 can be easily and reliably attached to an accurate position in a place where the degree of attachment difficulty is high.

The form 100 is positioned so that the bolt 60 pulls the plug 20 toward the first temporary frame F1, and the form 100 is supported by the first temporary frame F1 in a cantilever manner. . Therefore, even if the formwork 100 is composed of a plurality of tubular members such as the pipe 105 and the joints 110 and 120, it is possible to easily position the formwork 100 along the horizontal direction, and the formwork 100 can be positioned as an axis. It can be securely fixed even in a size that is long in the direction.

On the other hand, the first and second forms F1 and F2 can be removed while the plugs 40 and 20 are connected. Therefore, the construction of forming the through holes can be finished simultaneously with the removal of the first and second forms F1 and F2. Moreover, the plugs 20, 40 can be reused by removing the plugs 40, 20 from the first and second forms F1, F2.

In this embodiment, the flange 25 of the plug 20 and the flange 45 of the plug 40 are in contact with the end surfaces of both ends 100T2 and 100T1 of the mold 100 (end surfaces 110S and 120S of the joints 110 and 120). The side surfaces 112S, 122S of the protrusions 112, 122 and the inner surfaces 20S2, 40S2 (see FIG. 1) of the flanges 20, 40 may be in contact with each other. Alternatively, it is also possible to have a configuration in which both are brought into contact.

Next, a plug as a second embodiment will be described with reference to FIGS. 9 and 10. FIG. In the second embodiment, unlike the first embodiment, the plug is not flanged.

FIG. 9 is a plan view of the plug in the second embodiment. FIG. 10 is a cross-sectional view of the plug in the second embodiment. The plug 220 has a through hole 222 around the central axis, and a stepped portion 221 is provided to form a hole portion 222B in which the hexagonal nut 62 fits and a hole portion 222A through which the bolt 60 passes. A mark 220P serving as a mark of the screwing position is provided along the peripheral direction of the surface 220S. By installing the plug 20 that does not form a flange in the formwork 100, after the second temporary frame F2 is removed, the end face of the through hole OP is shaped along the side surface of the concrete CF.

Next, a plug as a third embodiment will be described with reference to FIGS. 11 and 12. FIG.

FIG. 11 is a plan view of a plug in the third embodiment; FIG. FIG. 12 is a cross-sectional view of the plug in the third embodiment. The plug 320 is composed of a relatively large-diameter cylindrical portion 321 and a relatively small-diameter cylindrical portion 322T, which are joined by a known connecting means such as an adhesive. The plug 320 has a through hole 322 around the central axis, and a stepped portion 321 is provided to form a hole portion 322B in which the hexagonal nut 62 fits and a hole portion 322A through which the bolt 60 passes.

An insertion member 330, which is in the shape of a hexagonal column here, is pushed into the hole portion 322B when the through hole is formed. As shown in FIG. 11, marks P serving as marks for screwing positions are provided along the peripheral direction of the surface 220S and are also provided on the hexagonal member 330. As shown in FIG. Since the plug 20 can be screwed in the center in this way, the plug 20 can be firmly connected to the second temporary frame F2, and the number of screwings at the peripheral portion can be reduced. Note that the insertion member 330 may be configured in a shape other than a hexagonal medium shape, such as a cylindrical shape.

Next, a plug according to a fourth embodiment will be described with reference to FIGS. 13 and 14. FIG. In the fourth embodiment, unlike the first to third embodiments, the plug installed on the second mold side is screwed with the bolt end.

FIG. 13 is a cross-sectional view showing members used to form a mold and through holes in the fourth embodiment. FIG. 14 is a plan view of the plug in the fourth embodiment. The plug 20' is composed of a columnar portion 21' having a flange 25' and a tubular portion 22' having a hole 22'N formed around the central axis. is doing. A female thread 22M' is formed on the inner peripheral surface of the bottomed hole 22' of the cylindrical portion 22'. By screwing the end portion T2 of the bolt 60 into the hole 22', the plug 20' is attached to the formwork 100 by tightening and fixing the bolt 60 to the first temporary frame F1, as in the first embodiment. force along the axial direction toward the first temporary frame F1. In addition, the tightening of the nut 62 is not required, and the process work is improved. Then, like the third embodiment, it can be screwed to the center of the plug 20'.

Next, a plug according to a fifth embodiment will be described with reference to FIGS. 15 and 16. FIG. In the fifth embodiment, unlike the fourth embodiment, the plug is not provided with a flange, and a through hole without a stepped portion is formed.

FIG. 15 is a plan view of the plug in the fifth embodiment. FIG. 16 is a cross-sectional view of the plug in the fifth embodiment. The plug 20 ″ has a through hole 22 ″ with a constant diameter, and a female thread 22 ″ M is formed on the inner peripheral surface of the plug 20 ″. The weight can be concentrated in the vicinity to stabilize fixation along the axial direction (horizontal direction).

FIG. 17 is a cross-sectional view of the plug of the sixth embodiment. Plug 420 has a through hole 422 . On the other hand, unlike the first to third embodiments, the plug 420 is provided with an annular recess 430 on the mold 100 side. This makes the plug 20 lighter.

FIG. 18 is a cross-sectional view of the plug of the seventh embodiment. The plug 520 includes an engaging portion 540 having a bottomed hole 522 with a female thread 522M, and an annular recess 530 is formed around it. By forming the engaging portion 540 around the annular recess 530, the length in the axial direction can be suppressed.

In the first to seventh embodiments, the plugs were installed at both ends of the formwork, but the plugs were installed only at the ends on the second formwork side, and at the ends on the first formwork side. may be configured without a plug. In addition, by the configuration of the bolts with heads and the rod-like members other than the bolts, the plug installed on the side of the second formwork and the formwork axially exert a force on the side of the first temporary frame. An engagement structure (fitting, hooking, etc.) may be employed.

The method of connecting the plug on the second temporary frame side to the second temporary frame may be a method other than screwing. Furthermore, the step of connecting the plug to the second temporary frame may be skipped, and the ends of the formwork 100 may be connected to the second temporary frame to stabilize and fix. In this case, the material of the plug is arbitrary as long as it can be engaged with the rod-shaped member.

The formwork 100 is used as a formwork for forming through holes, but it can also be installed as it is after placing concrete for uses such as drainage pipes, gas pipes, exhaust pipes, and ventilation pipes. Of course, for the purpose of forming through-holes for wiring, etc., it is also possible to constitute as a through-frame material that is removed after placing concrete. Furthermore, the through-hole may be formed using actual piping instead of a mold such as a sleeve.

20 plug 40 plug 60 bolt

Claims (12)

A step of installing a first temporary frame;
A cylindrical member engageable with a rod-shaped member and in contact with the end surface and/or the inner surface of the formwork or pipe is provided at one end of the tubular formwork or pipe that is remote from at least the first temporary frame. , the step of installing;
One end of the rod -shaped member is engaged with the tubular member so as not to protrude from the end face of the tubular member opposite to the first temporary frame, and the rod-shaped member is connected to the formwork or pipe. a process of passing inside;
a step of fixing the rod-shaped member to the first temporary frame so that the cylindrical member exerts a force along the axial direction on the formwork or pipe toward the first temporary frame;
A step of installing a second temporary frame in accordance with the position of the formwork or pipe fixed to the first temporary frame;
The end face of the tubular member is connected to the formwork or pipe of the second temporary frame through the contact surface between the inner surface of the second temporary frame on the formwork or pipe side and the end face of the tubular member. connecting the tubular member to the second temporary frame from the outer surface opposite to;
After placing the concrete, the step of releasing the fixation of the rod-shaped member to the first temporary frame;
and removing the second temporary frame while the cylindrical member is connected. causing the rod-shaped member to pass through a through-hole formed along the central axis of the tubular member;
2. The rod-shaped member is engaged with the tubular member by bringing an abutting portion provided at one end of the rod-shaped member into contact with the stepped portion of the through hole. Construction method of the through-hole described in. the rod-shaped member is a bolt,
3. The method of constructing a through hole according to claim 2, wherein one end of said rod-shaped member is brought into contact with said step portion by screwing a nut onto one end of said rod-shaped member. 2. The method of constructing a through hole according to claim 1, wherein the rod-shaped member and the tubular member are engaged with each other by screwing the rod-shaped member and the tubular member together. the rod-shaped member is a bolt,
5. The method of constructing a through hole according to claim 4, wherein the rod-shaped member is screwed into a female thread portion provided along the central axis of the cylindrical member. 6. The tubular member is connected to the second temporary frame by screwing the tubular member from the outer surface of the second temporary frame. The construction method of the through-hole described. Install the tubular member at both ends of the formwork or pipe,
7. The tubular member that contacts the first temporary frame is connected to the first temporary frame through a contact surface with the first temporary frame . The construction method of the through-hole described. 8. The method of constructing a through-hole according to claim 1, wherein the through-hole is formed using a plurality of forms, a plurality of pipes, or a combination of forms and pipes. A step of installing a first temporary frame;
At one end of the formwork or pipe that is remote from the first temporary frame , there is a first step that can contact the end surface and/or the inner surface of the formwork or pipe and that has a stepped portion that expands the space. A first temporary frame opposite side cylindrical member formed with a temporary frame opposite side through hole is formed such that a relatively large diameter hole portion of the first temporary frame opposite side through hole faces the opposite side of the first temporary frame. a step of installing as
At the other end of the formwork or pipe, a first temporary frame side through hole is formed that can contact the end surface and / or the inner surface of the formwork or pipe and has a stepped portion that expands the space. A step of installing the first temporary frame side tubular member so that the relatively large diameter hole portion of the first temporary frame side through hole faces the first temporary frame;
A rod-shaped member having a male thread is inserted into the formwork or pipe, and a nut on the opposite side of the first temporary frame is attached to one end of the rod-shaped member passed through the through hole on the opposite side of the first temporary frame. a step of screwing and abutting the stepped portion of the cylindrical member on the opposite side of the first temporary frame;
a step of screwing a first temporary frame-side nut onto the other end of the rod-shaped member from the first temporary frame side and bringing it into contact with a stepped portion of the first temporary frame-side cylindrical member;
A first temporary frame nut is screwed from the outer surface of the first temporary frame on the opposite side of the formwork or pipe to the other end of the rod-shaped member passed through the through hole of the first temporary frame. securing the bar member at the other end to the first temporary formwork by tightening them together, thereby securing the formwork or pipe to the first temporary formwork. A construction method for a through-hole characterized by: A cylindrical member that can be used in a method for constructing a through hole,
A tubular member that, when installed at one end of a tubular form or pipe, is capable of contacting the end surface and/or inner surface of the form or pipe,
Engageable along a central axis with a rod-shaped member having a male screw that can be fixed to a first temporary frame installed on the side opposite to one end of the formwork or pipe, The first temporary frame can be connected to a second temporary frame installed on the opposite side ,
a cylindrical portion having a threaded portion formed around a central axis that can be screwed with one end of the rod-shaped member when installed at one end of the tubular mold or pipe; provided with a temporary frame and a columnar part that can be connected,
A tubular member , wherein the columnar portion and the tubular portion are coaxially joined together . A cylindrical member that can be used in a method for constructing a through hole,
A tubular member that, when installed at one end of a tubular form or pipe, is capable of contacting the end surface and/or inner surface of the form or pipe,
The first temporary frame is engageable along a central axis with a rod-shaped member that can be fixed to a first temporary frame installed on the side opposite to one end of the formwork or pipe. can be connected to a second temporary frame installed on the opposite side ,
Having a through hole formed around a central axis and provided with a stepped portion that widens the space toward one end of the formwork or pipe when installed at one end of the formwork or pipe ,
It can be inserted into a hole portion with a relatively large diameter of the through hole, and in the inserted state,
A cylindrical member comprising an insertion member that can be connected to the second temporary frame from the outer surface of the second temporary frame opposite to the formwork or pipe . 12. The tubular member according to claim 10 , wherein an annular recess is formed around the engaging portion with the rod-shaped member.

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